Major Cecil Aylmer Cameron CBE DSO (17 September 1883 – 19 August 1924) was a British Army officer and spymaster and also a central figure of a notable fraud trial of 1911. The son of Colonel Aylmer Cameron VC, he was educated at Eastman's Royal Naval Academy, Bath College, and the Royal Military Academy, Woolwich, and was commissioned into the Royal Field Artillery in 1901. On 3 June 1909, he married Ruby Mary Shawe at St George's, Hanover Square. Cameron, aged 40, was found shot dead at Hillsborough Barracks in Sheffield in 1924.